Students can be added to a course as a non-roster participant, meaning that there is no record of their participation in the database. Subsequently, there are no automated charges, allowing the opportunity for instructors or administrators to select observers or auditing students without affecting their enrollment in other classes. As instructors are context administrators, they can perform this task without additional support from the helpdesk.
Step 1:
Select Course Manager at the bottom of the course context menu. 
Step 2:
Select the tab for Permissions.
Step 3:
Select Manage non-roster students and faculty.
Step 4:
Select Add a non-roster student.
Step 5:
Select Add Individual Users.
Step 6:
Enter the name information to filter the results. Select the name of the student you would like to add and click add.
Continue this process until all students have been added to the column on the right. Then click OK.
Step 7:
The pop-up window will indicate the total number that were added to the course. Click Save and return to the course context.
Congratulations. This process is complete.